Elizabeth Guffey is Professor of Art and Design History at Purchase College, State University of New York, USA, where she also heads the MA in Modern and Contemporary Art. She is the author of Designing Disability: Symbols, Space, and Society (Bloomsbury, 2017), Posters: A Global History (2014), and Retro: The Culture of Revival (2002). Bess Williamson is Associate Professor of Design History at the School of the Art Institute of Chicago, where she teaches courses on modern and contemporary design in relation to politics and social change. Her book, Accessible America: A History of Disability and Design (2019), describes the role of design in the US Disability Rights cause of the last half of the 20th century.